This is a set of two activities about time. First, in Cosmic Calendar, learners will scale the evolution of the Universe to a one-year calendar, with the Big Bang occurring on the first moment of January first. Then, in Time-Line Scale Model of the...(View More) Age of the Earth, learners will use a 10-meter strip of paper to create a timeline for the evolution of our planet's surface, atmosphere and life. This is Actividad 8.2 as part of the El Universo a Sus Pies, a Spanish-language curriculum, available for purchase.(View Less)